"I'm sure they had the discussion," the "Prisoners" star shares his thoughts. "They didn't mention it to me, obviously!" The 45-year-old actor continues, "Look, that's inevitable, man. Anyone who thinks they're indispensable in this business is fooling themselves."

"But I feel unbelievably blessed to have this part. I never thought in a million years I'd get to play him seven times," he adds. "Every day I walk on the set with the claws and the hair, I thank my lucky stars. I don't take any of it for granted. To think that in a second version we'd have this cast and this director, and you guys don't know the script, but I would say probably the best script of all of them, is pretty amazing."

He goes on, "I think that's why I'm still here. I'm sure by the way, that it won't always be my decision to always be here. At some point, someone will close the door on me."

"Days of Future Past" will be released on May 23. It will see the mutants joining forces with their younger selves in a desperate attempt to change the past in order to save their future.